tequilaOS/platform_hardware_interfaces
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Merge "Fix ADR half cycle ambiguity doc (hardware/interfaces)" into sc-dev

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Yu-Han Yang 2021-06-22 19:07:54 +00:00 committed by Android (Google) Code Review
commit 9f834f1a91
3 changed files with 52 additions and 2 deletions
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2
current.txt
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@ -772,7 +772,7 @@ a64467bae843569f0d465c5be7f0c7a5b987985b55a3ef4794dd5afc68538650 android.hardwar
e042522daa4b5f7fd4a0a19bcdadb93c79a1b04c09ef2c9813a3a8941032f3f5 android.hardware.contexthub@1.0::IContexthub
c2f64133b83ede65c9939ef97ab5bd867b73faf3dba0e7e69f77c3c43d9e487e android.hardware.contexthub@1.0::IContexthubCallback
bda492ec4021d13869de72bd6f8c15c5837b78d6136b8d538efec5320573a5ec android.hardware.gnss@1.0::IGnssMeasurementCallback
6a271e493907e8ba20912e42771bd0d99ae45431a851d5675ef9496d02510a34 android.hardware.gnss@1.1::IGnssMeasurementCallback
7ae2025662e30e690a3ffa1c65cc972c6297a68638174055c33cbf3d2e4bbddc android.hardware.gnss@1.1::IGnssMeasurementCallback
11e9e1a1fd0c9b3d9648750d4b10dc2a839d3a6688904c3fc49500a4e7ca75b0 android.hardware.gnss@2.1::IGnssMeasurementCallback
2c331a9605f3a08d9c1e0a36169ca57758bc43c11a78ef3f3730509885e52c15 android.hardware.graphics.composer@2.4::IComposerClient
3da3ce039247872d95c6bd48621dbfdfa1c2d2a91a90f257862f87ee2bc46300 android.hardware.health@2.1::types

27
gnss/1.1/IGnssMeasurementCallback.hal
View file

@ -24,13 +24,38 @@ interface IGnssMeasurementCallback extends @1.0::IGnssMeasurementCallback {
* Flags indicating the Accumulated Delta Range's states.
*
* See the table below for a detailed interpretation of each state. This is
* a continuation of the table from 1.1/IGnssMeasurementCallback.hal.
* a continuation of the table from 1.0/IGnssMeasurementCallback.hal.
*
* +---------------------+-------------------+-----------------------------+
* | ADR_STATE | Time of relevance | Interpretation |
* +---------------------+-------------------+-----------------------------+
* | HALF_CYCLE_RESOLVED | ADR(t) | Half cycle ambiguity is |
* | | | resolved at time t. |
* | | | |
* | | | For signals that have |
* | | | databits, the carrier phase |
* | | | tracking loops typically |
* | | | use a costas loop |
* | | | discriminator. This type of |
* | | | tracking loop introduces a |
* | | | half-cycle ambiguity that |
* | | | is resolved by searching |
* | | | through the received data |
* | | | for known patterns of |
* | | | databits (e.g. GPS uses the |
* | | | TLM word) which then |
* | | | determines the polarity of |
* | | | the incoming data and |
* | | | resolves the half-cycle |
* | | | ambiguity. |
* | | | |
* | | | Before the half-cycle |
* | | | ambiguity has been resolved |
* | | | it is possible that the |
* | | | ADR_STATE_VALID flag is |
* | | | set, but the ADR_STATE_ |
* | | | HALF_CYCLE_RESOLVED flag is |
* | | | not set. |
* +---------------------+-------------------+-----------------------------+
*/
enum GnssAccumulatedDeltaRangeState

25
gnss/aidl/android/hardware/gnss/GnssMeasurement.aidl
View file

@ -438,6 +438,31 @@ parcelable GnssMeasurement {
* +---------------------+-------------------+-----------------------------+
* | HALF_CYCLE_RESOLVED | ADR(t) | Half cycle ambiguity is |
* | | | resolved at time t. |
* | | | |
* | | | For signals that have |
* | | | databits, the carrier phase |
* | | | tracking loops typically |
* | | | use a costas loop |
* | | | discriminator. This type of |
* | | | tracking loop introduces a |
* | | | half-cycle ambiguity that |
* | | | is resolved by searching |
* | | | through the received data |
* | | | for known patterns of |
* | | | databits (e.g. GPS uses the |
* | | | TLM word) which then |
* | | | determines the polarity of |
* | | | the incoming data and |
* | | | resolves the half-cycle |
* | | | ambiguity. |
* | | | |
* | | | Before the half-cycle |
* | | | ambiguity has been resolved |
* | | | it is possible that the |
* | | | ADR_STATE_VALID flag is |
* | | | set, but the ADR_STATE_ |
* | | | HALF_CYCLE_RESOLVED flag is |
* | | | not set. |
* +---------------------+-------------------+-----------------------------+
*/
const int ADR_STATE_UNKNOWN = 0;